The section on the ECG findings in PE on the Investigations in PE – non imaging page has been revised considering the information from the following article:
Shopp, JD, Stewart, LK, Emmett, TW, et al. Findings From 12-lead Electrocardiography That Predict Circulatory Shock From Pulmonary Embolism: Systematic Review and Meta-analysis. Acad Emerg Med 2015;22(10):1127-37. http://www.ncbi.nlm.nih.gov/pubmed/26394330.